A poster posited a link between Parkinson's Disease (PD) and Statin use, which led me to an article in Movement Disorders, 2006 (PubMed ID 17177184) that points out, in a retrospective study, a strong link between low LDL and Parkinson's incidence. The lower the LDL, the more people had PD: up to 3 times as often with an LDL below 93.
However, that same article seemed to find a 'neuroprotective' effect for statins. The poster obviously knew more biochemistry than me, so I'm not incredulous, that's just what I found in an admittedly quick search. Updated articles are welcome. It certainly did confirm a link between low LDL and Parkinson's, from which I can infer that LDL is perhaps not entirely deserving of the pejorative 'bad' cholesterol label.
A Google search on statins, however, on the broader issue of Number Needed to Treat analysis, showed very high NNTs, like 33 here, based on a 2003 Lancet article. I'm not sure how reliable that is. However, with an NNT of 33 in people with diabetes, I suppose there is good reason to question statin use given the lack of mortality benefit, and given the serious side-effects; I'm not sure about PD, but pancreatitis and rhabdomyolysis are no picnic.
Just don't ask what the NNT is for epinephrine in out-of-hospital resuscitation. The evidence for a lot of our critical situation algorithms seems a bit thin from podcasts I listen to. Just a tad bit hard to study.